Paper cutter



Jan. 31, 1933. F BARNEY 1,395,440

PAPER CUTTER Filed Jan. 30, 1928 2 sheets-Shen 1 u s f. Ill/III; MKS 1 1 o In N @2% Q s 1 l 3 \S tu S/ 1 Q E l f I 1 lnueufor Jan. 31, 1933. ,v F; BARNEY "1,895,440

, PAPER CUTTER y Filed Jan. 30, 1928 V2 sheets-sham 2 Mlmilflwf-rmffwl @5v5 -5 lnonor reelmcm @ame l n E.

Patented Jan. 31, 1933 UNITED STATES PATEN'F; OFFICE FREEMAN BARNEY, vOF GRAND HAVEN, MICHIGAN, ASSIGNOR TO CHALLENGE MACHINERY COMPANY, OF GRAND HAVEN, MICHIGAN, A CORPORATION OF MICHI- GAN PAPER CUTTER Application led January 30, 1928. Serial No. 250,380.

This invention relates to a paper cutter and is concerned with many novel constructions for producing an eifective cutter for paper by means of which the place where the paper is to be out may be properly gauged in a simple and effective manner. It is one of the primary objects and purposes of the present invention to supply paper critters with gauging means whereby it is very easy to locate the paper with respect to the knife exactly as it should be. A further object of the invention is to prowde a simple and effective means for properly adjusting the back gauge against which the paper rests so that the paper will be cut square across. A still further object of the invention is to provide a means for movingsaid back gauge back and forth over the table and for clamping it in any position to which it has been moved, providing a novel guide and .clamping means which is located at the underside of the table `and which includes in its structure a depending rib or guide bar integral with the table and so positioned with respect to the table that it is very simple and easily machined at low cost so that the manufacturing cost of the device is reduced to a minimum. Many other objects and purposes than those stated Will be had after an understandingk of the invention from the following description taken in connection with the accompanying drawings, in which,

Fig. l is a. longitudinal verticalsectiony through the paper cutting machine having my invention applied thereto.

Fig. 2 is a fragmentary enlarged detail in plan showing the manner in which the gauge tape is attached to the back gauge of the cutter.

Fig. 3 is a fragmentary transverse sectional view through the cutter substantially on the plane of line 3 3 of Fig. 5.

Fig. 4 is a similar section substantially on the plane of line 4 4 of Fig. 5.

Fig. 5 is a fragmentary plan view of the back gauge of the cutter, and

Fig. 6 is a fragmentary longitudinal sec- Jion sgibstantially on the plane of line 6 6 of Like reference characters refer to like parts in the different figures of the drawings.

The paper cutter mechanism is mounted at the upper end of the pedestal 1 and includes 'flange at its front edge from which a plurality of spaced fingers 5 extend forwardly,

the front edges of which all lie in the same vertical plane, and against which the rea-r edges of the paper i-s placed.

Underneath the table 2 and extending at its upper part into the slot 3 is a member 6 f7() which, at its upper end, comes against the underside of the body 4.of the back gauge near the front thereof. The upper end of the member 6 is interiorly bored and a short cylindrical collar 7 is located and secured therein, at its upper end extending into a circular opening made in the base of the body 4 as best shown in Fig. 3. A cap screw 8 extends downwardly through the collar and threads into the member 6, its head bearing against a circular plate 9 located in a shallow circular recess made in the upper side of the body 4. Since the collar 7 is 4of cylindrical form the body 4 may turn about the vertical axis thereof. There is no 'bearing againstl the cap screw 8 which may not be exactly uniform. The cap screws 8, which are bought as stock parts, are not all of exactly the same shape and dimensions, and the structure which has been devised obviates the necessity of adliusting the part 4 with a bearing of the same against the ca-pscrew; but on the other hand,

the bearing is against the collar 7 which, in all of the constructions is of uniform shape and dimensions. The con-struction is very wear occurring being automatically talren up.

From the upper side of the body 4 at spaced apart points and parallel to the length of the slot 3, ribs 10 extend upwardly. Aryoke ll extends upwardly from the member 6 Said ' practical and is always sure in service, any '.95

through an opening in the bottom of the body 4 between the ribs 1l). A rod 12 passes through the opposite ribs and is secured therein against rotation and also passes be- 5 tween the sides of the yokes 11. The rod is threaded for the greater portion of its length and at each side ofthe yoke carries a nut 13. By adjusting the nuts to different positions it is evident that the back gauge may be adjusted about the vertical axis of the collar 7 and the forward ends of the fingers 5 so located as to be in a plane perfectly parallel to the plane of the cutting knife of the machine. This adjustment is a fine adjustment and a very slight movement of the adjusting nuts 13 in either direction causes a considerable variation in the position of the outer fingers 5 ofthe back gauge. It was for this reason that it is necessary to have the back gauge turn with a bearing about a properly designed central member, like the collar 7, rather than the imperfect capscrew 8.

From the lower side of the table 2 at one side of the slot 3 a guide rib 14 extends down- Wardly being machined on its opposite and lower sides. Itis readily planed as it is very easy to locate the same on a metal planing machine to properly finish the sides mentioned. From the member 6 a lateral ledge 15 extends .under the lower side of the guide rib 14, whereby the guidel 14 has a bearing at one vertical side against the member 6 and at its lower side against the ledge 15. From the ledge 15 at a plurality of spaced apart points fingers 16 extend upwardly spaced from the guide rib 14. A gib 17 lies against the outer side of the guide rib 14 and is held in proper guiding relation thereto by set screws 18 adjustably mounted at and extending through the fingers 16, as shown in Fig. 4.

Near the rear end of the member 6 a sleeve 19 is integrally cast extending downwardly therefrom and being interiorly threaded for the passage of a worm shaft 2O which extends to the front end of the table and is manually operated by means of the handle 21 through suitable gearing, which, asit forms no part of t-lie present invention, is not specifically shown and described. It is enough to say that on turning the worm shaft the back gauge may be moved to different positions over the table 2. A second shaft 22 is mounted parallel to, slightly below and to one side of the worm shaft 2() and at its front end is provided with a crank 23 whereby it may be rocked back and forth. Shaft 22 passes through spaced apart downwardly extending bearings 24 and between pairs of said bearings, as shown in Fig. 6, eccentrics 25 are splined on the shafts. A lever 26 is pivotally mounted between its ends at 27 and associated with each of the eccentrics 25, the lower end of each lever bearing against the outer surface of an eccentric. The upper ends of the levers lie between the fingers 16 and have screws 28 passing therethrough and locked in proper position so that on turning the rock shaft with a consequent turning of the eccentrics, the levers 26 are moved to bring the inner ends of the screws 28 against the gib 17 and press it into clamping engagement with the guide rib 14, thereby locking the back gauge in any position to which it has been adjusted on the table.

Near the front of the table at each side are suitable housing guides 29 for the slidable mounting of the cutting knife 30 and the bar to which it is attached. The mechanism for operating the cutter is not new and is not specifically shown or described. Back of the cutting knife is a clamping and guide member 31 which, after paper has been placed on the table, may be moved downwardly to press against and clamp the paper in position to be acted upon by the cutting knife. This feature in paper cutters also is old.

An idle pulley 32 is located in a horizontal plane and mounted to turn about a vertical axis on the front housing. An indicating pointer 31 is attached to the housing and has a downturned front end coming directly in front of the pulley 32. A second idle pulley 34 is mounted at the upper end of al post 35 fixed to and extending upwardly from the rear end of the table 2. A tape 36, having gauge indications thereon, passes around the pulleys 32 and 34, its ends coming together substantially and being connected with a post 37 extending upwardly from the back gauge body 4. The upper end of the post 37 carries a plate 38 to which the opposite ends of the tape are clamped making in effect a continuous tape. The plate 38 fits in a slot in the upper end of the post 37 and may be adjust-ed longitudinally and held adjusted position by a cap screw as shown in Fig. 2.

It is evident that the paper may be placed on the table in front of the back gauge and then by turning the shaft 2O the gauge may be moved forward. By observing the tape 36 the forward movement of the back gauge may be stopped when the proper figure on the tape 36 comes to the pointer 33. Then by operating the crank 23 the back gauge is firmly locked to the table. may be lowered and then the knife 30 brought down to cut the paper. The distance between the point where the knife cuts the paper and the rear edge of the paper where it bears against the fingers 5 will be that shown by the figure on the tape 36 at the pointer 33.

This construction of paper cutter is very. practical and serviceable and has so proved in actual practice. Itis very simple and easy to get a desired length or width of paper without having to carefully and accurately measure the position of the back gauge, as the tape 36 in conjunction with the pointer 33 will always indicate what the distance is The clamp 31 g between Where the knife cuts the paper and the edge thereof located against the back gauge fingers 5. The structure used for mounting the back gauge member for slidable movement is simple yet accurate and one in which all machine Work is of a relatively simple character. The angular adjustment of the back gauge is one Where error may be Wholly eliminated. These features combine to make a paper cutter substantially perfect in its operation.

The invention is defined in the appended claims and is to be considered comprehensive of all forms of structure coming Within the scope thereof.

I claim:

l. In a paper cutter, a horizontal table having a longitudinal slot therein, an elongated rib depending from the lower side of said table and extending parallel with said slot, said rib having faced vertical sides, a back gauge slidably mounted on the upper surface of said table, a guide member attached to and depending from said back gauge through said slot and engaging a Vertical side of said rib, said guide member being free of engagement with the sides of said slot, a gib associated with said guide member and engaging the opposite vertical side of said rib, a lever pivoted on said guide member and engageable with said gib, and manual means for moving said lever to clamp said gib against said rib.

2. In a paper cutter, a horizontal table, a back gauge slidably mounted on said table, a rib on said table extending longitudinally of the movement of said back gauge, a guide member attached to said back gauge and slidably engaging one surface of said rib, a friction member associated With said guide member engaging the opposite surface of said rib, a pivoted lever associated with said guide member and engageable With said friction member for forcing it into clamping engagement with said rib, and manual means for moving said pivoted lever.

3. In a paper cutter, a horizontal table, a back gauge slidably mounted on said table, a rib on said table extending longitudinally of the movement of said back gauge, a. guide member attached to said back gauge and slidably engaging one surface of said rib, a friction member associated With said guid-e member engaging the opposite surface of said rib, a pivoted lever associated with said guide member and engageable with said friction member for forcing it into clamping engagement with said rib, manual means for moving said pivoted lever, and adjustable means for holding the friction member in free slidinfr engagement with said rib.

In testimony whereof I aix my signature.

FREEMAN BARNEY. 

